Arunachal Pradesh is often called the land of dawn-lit Sun. Geographically, it is the largest state of the seven sister states.

Modern-day Arunachal is one of the linguistically richest and diverse regions in all of Asia. 

Arunachal Pradesh is often called the land of dawn-lit Sun. Geographically, it is the largest state of the seven sister states.

Modern-day Arunachal is one of the linguistically richest and diverse regions in all of Asia, being home to at least thirty and as many as fifty distinct languages.

The vast majority of languages indigenous to modern-day Arunachal Pradesh belong to the Tibeto-Burman language family. 

The majority of these, in turn, belong to a single branch of Tibeto-Burman, namely Tani. Almost all Tani languages have their origin in central Arunachal Pradesh, including Nyishi/Nishi, Apatani, Bangni, Tagin, Hills Miri, Galo, Bokar, Lower Adi(Padam, Pasi, Minyong, and Komkar), Upper Adi (Aashing, Shimong, Karko, and Bori), and Milang; only Missing, among Tani languages, is primarily spoken outside Arunachal Pradesh in modern-day Assam, while a handful of northern Tani languages including Bangni and Bokar are also spoken in small numbers in Tibet.

The  Kamti language is the representative of the Tai Language.  Khamti is a recent arrival in Arunachal Pradesh. In addition to these non-Indo-European languages, the Indo-European languages Assamese, Bengali, English, Nepali and especially Hindi are making strong inroads into Arunachal Pradesh.

In primary sections, the medium of teaching is mainly Hindi a large and growing section of the population now speaks a semi-creolized variety of Hindi as it is the mother tongue.

Despite, or perhaps because of, the linguistic diversity of the region. English is the only official language recognised in the state